It's ground war, and I noticed you say you got two chopper gunners.
If you get two chopper gunners on ground war, and if the enemy team is so noob, that they do not immediately shoot down your chopper, it isn't such an impressive score.

So yeah, whether or not this is a good score depends on how you got it, and how your enemy team was.
A score like that is not that uncommon for me personally, but as I said that doesn't mean I am that good, it more often means the enemy team sucked balls.
You can easily detect a noob team; if a chopper, or harrier or any kind of airsupport stays in the air the entire lenght, without being shot down.
If your enemy is somewhat decent, your chopper gunner would have been shot down before you got your first kill.

Either way, it's remarkable you got such a good score with such a bad ping on such a crappy host (omg)